Has type of units appropriate for items you want to store. Is it climate-controlled? Items of high value may require solid cement or steel walls, while mesh-walled lockers may be fine for lower value items.
Has right size units for your needs and allows for increasing or decreasing space if need be. Having to store your belongings at different facilities can be very inconvenient.
The facility has sufficient security measures in place. Storage areas can be prime targets for burglary if there is not adequate security to deter it.
Hours of access to your self-storage unit are acceptable. Some storage units offer 24-hour card access while others may only be open regular business hours.
Units are clean and well-maintained to ensure safe storage of your belongings.
Pest control measures are in place. Even the cleanest facilities can encounter pest problems and should take preventative measures.
Units allow easy access for your moving vehicle. Having moving crews walk a long distance between the truck and the storage unit can prove to be very expensive.
Read your rental contract thoroughly to avoid any nasty surprises.